linux-kernel - Re: [PATCH] ARM: sun8i: a33: add dts for Q8 tablets with different resolution

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Date:   Mon, 21 Aug 2017 16:44:30 +0800
From:   icenowy@...c.io
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     devicetree@...r.kernel.org, Chen-Yu Tsai <wens@...e.org>,
        linux-sunxi@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: sun8i: a33: add dts for Q8 tablets with different
 resolution

在 2017-08-21 16:40，Maxime Ripard 写道：
> On Thu, Aug 17, 2017 at 03:49:26PM +0800, Icenowy Zheng wrote:
>> Q8 tablets with Allwinner A33 SoC now come with two kind of LCD, 
>> either
>> 800x480 or 1024x600.
>> 
>> In order for sun4i-drm to be able to choose correct LCD configuration,
>> two different device trees should be present, one for a resolution.
>> 
>> Add stub device trees for two resolutions.
>> 
>> As the sun4i-drm driver still has some problems to support the LCDs, 
>> the
>> real LCD device nodes are not added to the device tree files.
>> 
>> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> 
> This should be an overlay, ideally applied by the bootloader.

I think this is not suitable for overlay.

The two kind of Q8 tablets are not compatible at all, and they
should both have a suitable device tree. The old DT without
resolution is only kept for backward compatibility.

> 
> Maxime
> 
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> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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